n2k-signalk

NMEA 2000 to Signal K (signalk.github.io) converter. Converts Canboat analyzer JSON output to SignalK JSON.

For mapping NMEA 0183 data to SignalK see nmea0183-signalk.

USAGE

Usage from command line

$ actisense-serial /dev/actisense | analyzer -json 2>/dev/null | n2k-signalk | head -5
{"environment":{"windSpeedApparent":{"value":2.93,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.384","src":"105"}}}}
{"environment":{"windAngleApparent":{"value":341.4,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.384","src":"105"}}}}
{"environment":{"windSpeedApparent":{"value":2.93,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.385","src":"105"}}}}
{"environment":{"windAngleApparent":{"value":341.4,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.385","src":"105"}}}}
{"environment":{"windSpeedApparent":{"value":2.93,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.385","src":"105"}}}}
$ actisense-serial /dev/actisense | analyzer -json 2>/dev/null | n2k-signalk --flat | head -5
{"path":"environment.windSpeedApparent","value":2.93,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.384","src":"105"}}
{"path":"environment.windAngleApparent","value":341.4,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.384","src":"105"}}
{"path":"environment.windSpeedApparent","value":2.93,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.385","src":"105"}}
{"path":"environment.windAngleApparent","value":341.4,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.385","src":"105"}}
{"path":"environment.windSpeedApparent","value":2.93,"source":{"pgn":"130306","timestamp":"2013-08-24-15:31:50.385","src":"105"}}

Usage as stream transformer

See bin/n2k-signalk.

Usage for a single transformation

See bin/demo.js.

Custom Sentences

You can add custom n2k mappings via the Signal K Server plugin mechanism. A plugin can register custom mappings by emitting pgn-to-signalk PropertyValues with a value that is a map with the pgn number has the key and the n2k mappings as the value.

See signalk-over-n2k for an example.